Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1982-09-03
1984-12-11
Christian, Leonard D.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
242200, 346136, G03B 104, G11B 1532, G01D 1526
Patent
active
044873824
ABSTRACT:
A cassette for a scratch strain recorder has a rotatable supply bobbin geared directly to a rotatable take-up bobbin so that rotation of the take-up bobbin will be equal in amount but opposite in direction to that of the supply bobbin. The recording tape is formed of a roll of flat resilient material which has one end attached to the supply bobbin and which, in the unused condition, is almost totally wound around the supply bobbin except for the other end which is attached to the take-up bobbin. The tape is driven by a capstan and pinch roller, the capstan being arranged for driving connection to a drive shaft of the strain recorder itself. Because of its inherent resilience the coil tries to straighten, i.e. unwind, and this assists rotation of the two bobbins when the capstan is operated and the direct gear interconnection causes an equalization of the spring forces between the two bobbins as the cassette progresses from an unused condition to a nearly completely used condition.
REFERENCES:
patent: 2994147 (1961-08-01), Bergier et al.
patent: 3034241 (1962-05-01), Kossor et al.
patent: 3195242 (1965-07-01), Ward et al.
patent: 3306548 (1967-02-01), Polder
patent: 3365142 (1968-01-01), Bakke et al.
patent: 3787885 (1974-01-01), Johnson
patent: 3790951 (1974-02-01), O'Neill et al.
patent: 3906511 (1975-09-01), Kelemen
Christian Leonard D.
Leigh Instruments Limited
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